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02 Jan 2011, 20:21

The owner of a hobby store needed to calculate the percentage of customers who purchase wood glue. Upon completing his survey, he noticed that 60% of the people that entered his store purchased an item. Of those customers, 15 percent purchased wood glue. What percent of the people that entered the store purchased wood glue? answer is 9%

I dont know what I am doing wrong, I cant get the answer

Also this one, Frank is 15 years younger then John. In 5 years John will be twice as old as Frank. How old will Frank be in four years? answer is 14

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The owner of a hobby store needed to calculate the percentage of customers who purchase wood glue. Upon completing his survey, he noticed that 60% of the people that entered his store purchased an item. Of those customers, 15 percent purchased wood glue. What percent of the people that entered the store purchased wood glue? answer is 9%

I dont know what I am doing wrong, I cant get the answer

Also this one, Frank is 15 years younger then John. In 5 years John will be twice as old as Frank. How old will Frank be in four years? answer is 14